UA65881U - Unloading grid of drum mill - Google Patents

Abstract

An unloading grid of a drum mill comprises sectors with working and nonworking surfaces and through holes in the form of a slot, which width on the sector working surface is greater than the slot width on the nonworking surface of a sector, and on the inner surface of holes a lug is made that separates the holes in two parts, each of which has the shape of a truncated cone in the cross section. The depth b of the part of hole from the working side of grating is determined by the ratio. The angle α of inclination of the lateral surface of truncated cone of the part of hole from the working side of grating is within 0° ... 5°.

Description

Kk1-0.005...0.05; Unloading grid of the drum mill

AN - lattice height, mm, shown in the drawings. and the angle o the angle of inclination of the side surface of the truncated Fig. 1 - a general view of the cone of the opening from the working side of the discharge grate with sectors is presented; is within c-02...57. Fig. 2 - section AA in fig. 1, where it is shown

The disadvantage of this design is that for the longitudinal section of the opening of the sector. the value of depth B is not taken into account, all standard sizes. The unloading grid of the drum mill and possible changes in the thickness of the grid are not taken into account. It consists of sectors 1, which are connected by lifters 2 tok depending on the required service life with the help of fasteners. The grid has linings. working 3 and non-working 4 surfaces. Open 5 spaces

The useful model was based on grids hidden along the chord of the circle and made to improve the design of the unloading station through and through. Longitudinal and cross-section of the grid due to the optimization of the hole depth parameter 5 has the form of a slot, the width of which on the working side of the hole on the working side of the grid is greater than the width of the slot. non-working surface 4 of sector 1. The internal size of the mills, thanks to which the surface of the holes 5 has an uneven broken calibration of the unloaded material, the fill formed by the protrusion 6. The protrusion 6 divides in size, and, accordingly, increases the necessary internal the surface of the holes 5 into two parts 7 and the service life, reliability and durability of the fu- 8. Each part 7 and 8 has the shape of a truncated contour of a drum mill. sa in longitudinal section.

The task is solved by the fact that the depth p of the opening part from the working side of the loading grate of the drum mill, which grate is determined from the ratio p-a Kk p. contains sectors with a working and non-working surface: a - the width of the gap on the working surface of the sector holes and through holes in the form of a slit, ra, mm; n - the height of the grid, mm, K - the coefficient, the width of which on the working surface of the sector is larger, selected from the interval 0.001...0.06. than the width of the gap on the non-working surface of the sector. Numerous experiments have established that a protrusion is made on the inner surface of the holes, the coefficient K depends on the technological parameters, which divides the holes into two parts, each of which the diameter of the grinding bodies. has the shape of a truncated cone in the transverse section. The angle of inclination of the lateral surface of the truncated cone is o. cut, according to the useful model, depth B time - selected from the interval 07...57. The diameter of the hole on the working side of the grate is determined by the ratio p-a K n when the mill drum rotates and dips, where: a - the pulp width of the grating sectors with slits along the working slit on the working surface of the sector, mm; Пп - height of the surface, sufficiently crushed product passes through the grates, mm; K is the coefficient of slippage of the grinding material through the holes in the grid and is discharged through the unloading trunnion, which is in the range of 0.001...0.06. and the angle is - the angle of inclination of the side surface of the truncated co- Execution of lattice openings, which in the cross-section of the part of the opening from the working side of the lattice, cross-sections have a complex broken shape, formed which is within 02...57. two conical surfaces connected between

The inventors experimentally, in particular, with the formation of a protrusion and with the depth of the part using experimental samples of the unloading hole from the working side of the grate, determined by the grate on mills of different sizes, according to the geometric parameters of the grate opening, it was determined that the coefficient K depends from the technology, as well as using the coefficient, determined parameters of the mill operation and the diameter of the bodies, determined by the experimental method, which takes into account the grinding technology. technical parameters of the mill and the diameter of the bodies which

Angle of inclination of the lateral surface of the truncated cone c; grind, will contribute to the maintenance of the required value - 3 intervals 029...59 should be selected, of the geometric parameters, in particular, the width

Due to the application of the proposed opening angle 5 in the process of wearing the working part, a clear calibration of the upper material is ensured, and, accordingly, the obtaining of the fraction is unloaded, the service life of the material of the required size is increased, as well as the reliability and durability of the lining. protect the reliability and durability of the grid when using it for different standard sizes of mills.

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State Intellectual Property Service of Ukraine, st. Urytskogo, 45, Kyiv, MSP, 03680, Ukraine

SE "Ukrainian Institute of Industrial Property", str. Glazunova, 1, Kyiv - 42, 01601